Most people have met WIFI can be turned on,
but the signal is weak or it has no signal when being away from the router.
It's very frustrate and anxious. Now, you can kill the problem. Before you
begin to repair, you need some phone repair tools
and accessories. Well, when you are prepared these tools, let's start to solve
the problem.
Example 1 iPhone 6 Plus WiFi still works
but has weak signal.
Trouble Phenomenon
WiFi can be turned on, but the signal is
weak. It has no signal when being away from the router.
Repair Process
After power on test only one or two WiFi
hotspot can be found and the signal is weak, but trouble-free iPhone can search
more than ten hotspots. Therefore, the trouble can be considered as weak
signal.
After disassembling, the WiFi chip is found to be replaced. In order to
test whether the chip is workable, using an accessory antenna to replace the peripheral
antenna circuit of the chip. The way is to use a 10 cm enameled
jump wire acting as antenna starting from C5213_RF near WiFi, as
shown in below picture 1-1.
Turning on iPhone again after finish the
above steps, many WiFi hotspots can be found now. At the same time, the signal
has been normal. This is mainly because the WiFi signal filter FL_CELL_WIF_RF
has been damaged. But the removal of filter has no effect on the iPhone
operation. In the case of repair, we often use the enameled wire directly
ignoring the filter chip.
As is shown in the PBC picture 1-2.
The material object picture of placing the
enameled jump wire is shown in picture 1-3.
After smearing the enameled wire with UV Solder Resist and assembling test, the
signal becomes normal. The trouble is removed.
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